%&LaTeX
\documentclass{article}

\usepackage[latin1]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{textcomp}

\begin{document}

\begin{thebibliography}{1}

\bibitem{Esmahi2007} Esmahi, L. (2007). \textit{An Agent-Based Framework for Personalized E-Learning Services} (Vol. 2).

\end{thebibliography}

\end{document}

